Nissan Versa (N17): P1148 closed loop control

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / P1148 closed loop control

DTC Logic

DTC DETECTION LOGIC

NOTE: DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

DTC No. Trouble diagnosis (Trouble diagnosis content) DTC detecting condition Possible cause
P1148 CLOSED LOOP-B1 (Closed loop control function) The closed loop control function does not operate even when vehicle is being driven in the specified condition.
  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)
  • A/F sensor 1
  • A/F sensor 1 heater

Diagnosis Procedure

DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

Refer to EC, "DTC Index".

P1078 EVT control position sensor

P117A air fuel ratio

Other materials:

Stall test
Work Procedure INSPECTION Inspect the amount of engine oil. Replenish the engine oil if necessary. Refer to LU "Inspection". Drive for about 10 minutes to warm up the vehicle so that the A/T fluid temperature is 50 to 80C (122 to 176F). Inspect the amount of ATF. Replenish ...

Unexpected pedal reaction
Diagnosis Procedure 1.CHECK BRAKE PEDAL STROKE Check brake pedal stroke. Refer to BR "Inspection and Adjustment". Is the stroke too big? YES >> Bleed air from brake line and hose. Refer to BR "Bleeding Brake System". Check brake pedal, brake booster, and master cy ...

Categories


© 2017-2025 Copyright www.niveguide.com
0.0059